Chapter 6.3, Problem 51STP

To determine

To identify:The correct option for the kilometers per hour contained in $55$ miles per hour.

  $\begin{array}{c}\left(\text{A}\right)\text{34 kilometers per hour}\\ \left(\text{B}\right)\text{50 kilometers per hour}\\ \left(\text{C}\right)\text{88 kilometers per hour}\\ \left(\text{D}\right)\text{98 kilometers per hour}\end{array}$

Answer to Problem 51STP

The correct option out of given options is option $\left(C\right)\text{88 kilometers per hour}$ .

Explanation of Solution

Given information:

The options provided are as follows,

  $\begin{array}{c}\left(\text{A}\right)\text{34 kilometers per hour}\\ \left(\text{B}\right)\text{50 kilometers per hour}\\ \left(\text{C}\right)\text{88 kilometers per hour}\\ \left(\text{D}\right)\text{98 kilometers per hour}\end{array}$

Recall that the conversion rule that 1 mile per hour is 1.6 kilometers per hour.

So, $55$ miles per hour is evaluated as when $55$ is multiplied by 1.6.

Therefore, $55$ miles per hour is,

  $\begin{array}{c}1\text{miph}=1.6\text{kmph}\\ 55\text{miph}=\left(55\times 1.6\right)\text{kmph}\\ 55\text{miph}=88\text{kmph}\end{array}$

Thus, $55$ miles per hour are same rate as $88$ kilometers per hour.

Hence, the correct option out of given options is $\left(C\right)\text{88 kilometers per hour}$ .